Apparatus for generating and superheating steam.



G. R. PROWSE. APPARATUS FOR GENERATING AND SUPERHEATING- STEAMAPPLICATION FILED DBO. 26, 1906.

Patented. May 4, 1909.

3 SHEETS-SHEET 2.

A :v A!!! G. R. PROWSE.

APPARATUS FOR GENERATING AND SUPERHEATING STEAM.

APPLICATION rum) D30. 26, 1906.

.920, 1 s1 Patented May 4, 1909.

3 SHEETS-SHEET 8.

UNITED STATES PATENT OFFTQE.

GEORGE ROGER PROWSE, OF MONTREAL, QUEBEC, CANADA.

APPARATUS FOR GENERATING AND SUPERHEATING STEAM.

T 0 all whom it may concern:

Specification of Letters Patent.

Application filed December 26, 1906.

Patented May 4, 1909.

Serial No. 349,568.

I steam and hot water and, particularly super- Be it known that I,GEORGE ROGER l heated steam at atmospheric pressure.

PROWSE, of the city of Montreal, Province of Quebec, Canada, haveinvented certain new and useful Improvements in Apparatus for Generatingand Superheating Steam; and I do hereby declare that the following is afull, clear, and exact description of the same.

My invention relates particularly to apparatus for use in su plyingsteam or hot water or both for household use either in cooking orheating, and it has for its object to provide an apparatus whereby ahigh temperature is secured without pressure.

The invention may be said briefly to consist of an apparatus comprisinga water receptacle kept supplied by an automatic water su plying device,a steam chamber below the level of the top of the water receptacle andinto which hot water is fed from the said water receptacle by primingduring ebullition, a steam superheating chamber below the level of thefirst steam chamber and ada ted to receive the priming from the said ststeam chamber, and one or more discharge ducts. The water receptacle hasan automatic valve controlled communication between it and a hot-watertank, and the discharge chamber has pi es throu 'h which the superheatedsteam is ed for codking, heating or other purposes, and a pipepieferably constantly open to the atmosp ere.

For full comprehension, however, of my invention reference must be hadto the accompanying drawings, forming a part of this s eclfication, inwhich similar reference 0 aracters indicate the same parts and wherein:-

Figure 1 is a side elevation of the fire box of a cooking stove,provided with my invention; Fig. 2 is a longitudinal sectional Viewthereof taken on line A A Fig. 3; Fig. 3 is a transverse sectional viewtaken on line B B Fig. 4; Fig. 4 is a horizontal sectional view takenonline 0 C Fig. 3 Fig. 5 is a per- Speotive View of a range providedwith my invention and Fig. 6 is a detail sectional view of a check-valvesuch as used in my apparatus.

Although I have illustrated and will now describe my invention appliedto cooking stoves I do not confine myself thereto as the broadconception of my invention is applicable to any apparatus required toprovide In the present embodiment of my invention the water receptacleconsists of a comparatively flat vertically disposed section 1)preferably forming the rear of the fire box and a pair of similar sidesections 0, c and front section cl. Theside sections and all but themiddle portion of the front are divided by a pair of horizontalpartitions c, f, into main. converting chambers g, and a superheatingchamber 7L extending continu ously around the device from one side ofthe water receptacle to the other, the main converting chambers 9 havetheir rear ends overlapping the ends of the water receptacle with whichthey communicate through ports 9 g.

The partitions have vertical end walls i to retain a quantity of watersufficient, and no more, to absorb from the lire the heat units over andabove what is re uired for cooking in the ovens (indicated at r), suchquantity of Water being determined by the height of these walls 'i whichretain the water (due to the priming above mentioned) until it isentirely turned into steam. If more than the required quantity of wateris primed into these chambers 9 it will in turn be fed by priming intothe chamber h wherein an intense heat will be constantly maintained. Thespace m between the ends of the partitions 6 and f constitutes a portdown which the steam or priming passes to the superheating chamber h;while the opposite ends of the latter communicate with a air of verticalducts 0 from which lead the pipes for conducting the super-heatingsteam, such ducts being formed and the ends of chambers g accommodatedby extensions 29, p, of the water section I).

The device whereby the water receptacle is automatically kept suppliedconsists of a tank 2'having in communication therewith a chamber 3 witha water supplying pipe 4 connected thereto and a ball-cock 5 controllingthe discharge from this pipe into the chamber. A glass water gage 6 ismounted upon the tank and the lower end of the latter is connected by apipe 7 to the lower portion of the water receptacle 1) while its upperend is connected to a pi e 8 leading from the top of the receptaclelPand also serving as a means for supplying steam for domestic use.

Hot water for domestic use is supplied from this apparatus by means of atank 10 containing a coil 12. The bottom of the tank is connected by apipe 14 leading from the upper end of the boiler l) and controlled by aweighted check valve 15, and a second ipe 16 leads from one of the ducts0 to the ower portion of one end of the tank, the latter pipe beingcontrolled by a weighted check valve 17 of less Weight than the valve15. The lower end of the coil is connected by a pipe 18 to the pipe 4and the upper end by a pipe 19 to a tank 20 from which hot water issupplied for domestic use; while a drip pipe 21 returns the water ofcondensation from the tank 10 to the return pipe 7 of the boiler, and ablow oil pipe 11 leads from the top of this'tank and is open to theatmos phere.

When this a paratus is applied to a cooking range the atter is providedwith steam cooking receptacles 25 which are fed from the pipe 16 by abranch 26 controlled by a check valve 27 of less weight than check valve17, and when there is any indication of ressure in the pipes 16 thevalve 27 will be lifted, While if even with such relief, the pressurerises, the valve 17 will be lifted and if the pressure still rises thevalve 15 will be lifted and the pressure be effectively reduced.

Operation: The operation of my improved apparatus is as follows :1Vhenthe fire is burning the temperature of the walls of the chambers g and his raised to an intense heat and the water in the water receptacle 1; isconstantly in a state of ebullition and this receptacle is keptsulliciently full to enable the riming due to ebullition to fallintermittently into the pans resented by thelower portions of the chamers g, the water being retained in these pans until it is converted intosteam or boils over into the chamber 72 The walls of these chambers gand of the chamber 72,, adjacent to the fire and forming the bottom ofthe chambers 9 become highly heated, and then the priming from theboiler, when it strikes these hot plates, is instantaneously flashedinto live steam. When these chambers g are fully charged with steam thecontinued action causes live steam to flow downwardly through the port minto the chamber h where it is superheated and finally delivered fromthe ducts 0 at a temperature of 450% (more or less according to thequality of the fire). The water in the receptacle 1) is kept at a leveldependent upon whether a comparatively large or small quantity of water,or steam only, is required to be fed to the chambers 9. This isregulated at the supplying device. The source of heat (the fire in thiscase) is protected by subjecting a comparatively small quantity of waterthereto this water being converted into steam which as above pointed outis superheated to a very high temperature, and this superheated steammay be utilized for any desired purpose.

Danger of damage to the walls of the ap paratus by the intense heat ofthe fire is re duced to a minimum by the steam with which the chambers gand h are charged such steam absorbing the heat from the walls andkeeping the temperature thereof comparative y low.

it may be mentioned here that the steam may be used as a drying mediumby connecting the steam and return pipes 16 and 18 respectively toopposite ends of the coil and locating the latter in a drying room, orin a tank from which water is circulated for heating purposes.

While I have described and illustrated flashing means 1 do not hereinclaim the same per se, as such forms the subject matter of a separateapplication, filed February 14, 1908, under Serial No. 415,919 andconstituting a divisional p art hereof.

What I claim is as follows 1. The combination with a heating apparatus,of a boiler adapted to emit the primings due to ebullition, meansreceiving the said primings and flashing the same into steam, and achamber in communication with such flashing means for the purpose ofenabling the steam to be collected and the latent heat thereof utilized.

2. The combination with a heating apparatus, of a boiler adapted to emitthe primings due to ebullition, means receiving the said primings andflashing the same into steam, a chamber contiguous to the said I boiler,a pipe connecting such boiler to the chamber, and means whereby thelatent heat of the steam collected within the chamber is utilized.

3. The combination with heating apparatus of a boiler and meansmaintaining a required Water level within the latter, of means forflashing steam from the primings emitted from the boiler, such meansbeing below the level of and in communication with the said boiler, achamber, a pipe connecting the boiler to the chamber, and means wherebythe latent heat of the steam is caused to act within the chamber.

4. The combination with a cooking apparatus of a heat generator, aboiler absorbing heat from the generator and having a mouth at its upperend; means maintaining a required level of water within the boiler; asteam generating chamber communicating with and below the level of thesaid mouth means retaining the water in the said chamber to facilitateits conversion into steam, a superheating chamber below the level of andcommunicating with the said generating chamber, and means whereby thesuperheated steam is utilized for cooking purposes.

5. The combination with the frame of a cooking apparatus of a heatgenerator; a boiler forming one Wall of such generator and having amouth at its upper end means maintaining a required level of water inthe boiler; a steam 'enerating chamber communioating With the mouth ofthe boiler and encircling the upper portion of the heat generator; asteam superheating chamber encircling the lower portion of such heatgenerator and communicating with the steam generating chamber; a steamcooking chamber; and means effecting a communication between thesuperheating chamber and the said steam cooking chamber.

6. The combination with the frame of a cooking apparatus of a heatgenerator, a boiler forming one wall of such generator and having amouth at its upper end; means maintaining a required level of water inthe boiler; a steam generating chamber communicating with the mouth ofthe boiler and encircling the upper portion of the heat generator; asteam superheating chamber encircling the lower portion of such heatgenerator and communicating with the steam generat ing chamber; a steamcooking chamber; means efl'ecting a communication between thesuperheating chamber and the said steam cooking chamber; a water heatingchamber; and valve controlled means effectin a communication between theupper end of the boiler and such water heating chamber.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

GEORGE ROGER PROWSE.

Witnesses:

WILLIAM P. MoFEA'r, FRED. J. SEARS.

